Question

Resistance of a 230 V heating device is 460 ohm. How much will be the heat energy produced by it in 20 minute?​

Answer 1

Answer:

Given,. v=230V

. t=10min=10x60=600s.

r=460Ω

. H=?

I=v/r=230/460=0.5.

H=l^2rt =(0.5)^2 x 460 x 600= 69000J.

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